Photocopying – Contact printing – Light boxes
Patent
1990-01-25
1991-10-15
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355277, 355279, 355290, G03G 1501, G03G 1514, G03G 1520
Patent
active
050578758
ABSTRACT:
In a color image forming method and apparatus utilizing electrophotography, a toner image bearing film is passed around a photosensitive member and moved past a transfer device, the photosensitive member is uniformly charged, and is then exposed to light images corresponding to different color components of the image. Developing devices are provided facing the toner image bearing film passing around the photosensitive member, and toners of different colors are then made to adhere to the toner image bearing film because of the latent image on the photosensitive member. Thus, the images of color toners are formed on the toner image bearing film, and then transferred to a recording paper. The images of color toners may be transferred one by one, or simultaneously. In the latter case, images of the colors, except or including the last-developed one, are temporarily fixed on the toner image bearing film, by application of heat, and then transferred to the recording paper. Transferring is facilitated by two rollers, one of which moves toward and away from the other roller.
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Grimley A. T.
OKI Electric Industry Co., Ltd.
Ramirez Nestor R.
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